Fault Code Thresholds Pinpoint HVAC Obsolescence Beyond the 15-20 Year Mark
Most HVAC systems last 15 to 20 years under normal use, but measured diagnostic standards for no-cool and no-heat faults reveal the true end-of-life point far more accurately than age alone. When fault-code data and documented thresholds from a professional inspection show repeated threshold breaches, your system has reached obsolescence regardless of calendar years elapsed. What Do No-Cool and No-Heat Fault Standards Reveal About Remaining Equipment Life? Diagnostic be